ISFJ + ISFJ

Being of the same type, in this case, shows great promise for a healthy relationship. 

Both are down-to-earth people and are devoted and loyal to their friends and family.  Both will respect and support the other's routines.

Knowing that others frequently misunderstand them, they should be sensitive to each other in this area and, in their typical dependable way, support each other, and reassure their partner of their value.